The Seniq Warmup Merino Baselayer Legging is a midweight base layer legging made from 100% merino wool. Merino is known for soft comfort, natural temperature regulation, and moisture management, which suits a layer worn against the skin. What Our Gearhead(R) Experts Are Saying:"Through long days on the trail, the crotch-seam-free build stayed comfortable hour after hour. The high-rise waistband stayed itch-free against my skin."